<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="app">
    {{msg}}
  </div>
  <!-- 引入vue模块 -->
  <script type="module">
    import { createApp, ref } from 'https://unpkg.com/vue@3/dist/vue.esm-browser.js'
    /* 创建实例 */
    createApp({
      data() { // 有点vue2的感觉
        return {
          //定义数据
          msg: '看看你的'
        }
      }
    }).mount('#app')

  </script>
</body>

</html>